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TivaC Tm4c1294 reading high particle rate question

Austin Chiao
Prodigy 20 points

Hi all. I am working on a project that requires me to detect particles at 10000 particles per second. I am completely new to programming these things. I am using the TivaC Tm4c1294 microcontroller. How should I go about doing this? Thanks in advance.

  • 0
    TI__Guru**** 244400 points
    Hello Austin,

    What is the sensor being used to detect the "particles", and what is the interface of the sensor that would interface with TM4C (or for that any uC)

    Regards
    Amit
  • 0 in reply to Amit Ashara
    Prodigy 20 points
    Hi,

    I am trying to record the change in impedance as the particles passes through two electrodes. The electrodes will send the change in impedance to the microcontroller. I don't have the full details of the system down but would like to know in general how can I achieve this?
  • 0 in reply to Austin Chiao
    Guru 11940 points

    The electrodes will send the change in impedance to the microcontroller.

    In a context of electrical engineering, this is a somehow vague and incorrect statement. In order to interface your electrodes to the MCU, you need to have some signal conditioning electronics to scale it into the 0 .. 3.3V the TM4C accepts. This can be either in analogue or digital form.

    "Change in impedance" means a change in voltage, if a current flows. Beside the involved levels (Ohms, Volts, Amps), the frequency of events would be of interest, too.

  • 0 in reply to Austin Chiao
    TI__Guru**** 244400 points
    Hello Austin,

    Then details are required. I cannot suggest anything when the input information is not clear. It is akin to sampling a signal when the input range, frequency and signal conditioning details are not available.

    Regards
    Amit
  • 0 in reply to Austin Chiao
    Guru 27665 points
    Austin, I'm a little worried from the description that you are dealing with the raw input to an ionizing particle detector.

    There is a big difference in complexity (and processor load) between
    - having a simple analog circuit convert changes to pulses that the micro counts and
    - having the micro measure impedance and detect pulses from an analog stream

    And as pointed there is the additional interface circuitry that both approaches may need.

    As Amit and f.m. have said, more details needed.

    Robert